Added more tests

src/ast/eachInstruction.go

@@ -51,10 +51,17 @@ func eachInstruction(tokens token.List, call func(token.List) error) error {
 			}
 
 			start = i + 1
+
+		case token.EOF:
+			if start < i {
+				return call(tokens[start:i])
+			}
+
+			return nil
 		}
 	}
 
-	if start != len(tokens) {
+	if start < len(tokens) {
 		return call(tokens[start:])
 	}